Numerical Simulation And Optimization In Remodeling Of Intake Manifold Of Automobile Engine

Intake and exhaust manifold are the key parts for the automobile engine. The flow characteristic of intake manifold has sensitively influence on engine, including economy performance, dynamical performance and the level of injurant emission. Lately, more and more requirements for engine make the quality of the port to be improved.Traditionally, steady-state flow rigs are widely used in the design of intake manifold for automobile engines, which was performed to evaluate the fluid dynamics of intake port. But experimental method can only offer global parameters; it is not able to get the detailed information about the in-cylinder flow structure. The design heavily relies on the intuition and experience of the designers. CFD, which based on numerical simulation, have recently made it possible to study the development of such engine flows in great detail, which can provide the information about the fields of pressure and velocity and how the structure parameters influence the flow pattern characteristics for the design and improvement of intake system.By far a combined use of both the available approaches, the experimental and the numerical one, is considered to be the most effective for a further intake systems improvement along a deeper insight in the related fluid dynamics. Only a close interaction between these two approaches can help in overcoming the respective limits.This paper studied the intake manifold of the gasoline engine. To the numerical model of the aluminum intake manifold constructed by Reverse-Engineering, this paper...